Child Theme Configurator

Child Theme Configurator provides a new approach to customizing WordPress by letting you identify and override only the Parent Theme style attributes you want to change. It gives you unlimited control over your WordPress look and feel while leaving your Parent Theme untouched.
The Child Theme Configurator parses and indexes a Theme's stylesheet so that every media query, selector, rule and value are at your fingertips. Second, it shows you how each change you make will look before you commit it to the Child Theme.Finally, it saves your work so that you can fine-tune your Child Theme without the risk of losing your edits.
When you are ready, just activate the Child Theme and your WordPress site takes on the new look and feel automatically.